<!DOCTYPE html>
<html lang="en">
    <head>
        <meta charset="UTF-8">
        <title>Document</title>
        <style>
            .box{
                width: 600px;
                height: 1200px;
                margin: auto;
                top: 0;
                left: 0;
                right: 0;
                bottom: 0;
                text-align: center;
            }
        </style>
        <script>
            'use strict';
            var arr =[3,4,5]
            for(let x of arr){
                console.log(x)
            }
        </script>
    </head>
    <body>
        <div class="box">
            <h1>feidiing</h1>
            <h2>转注于编程</h2>
            <img src="./earth.jpg" alt="图片" width="200px">
            <br>
            <a href="https://www.baidu.com" target="_blank">百度</a>
        </div>
      
    </body>
</html>
